Layouts options allow you to manage existing applications windows setting their position on screen and closing them.
Quick Layouts and Quick Layout Shortcuts give you ability to quickly move and resize the window to fill the full screen, half or the quarter of the screen exactly.
Double click to Zoom enables addition functionality of double click on window’s title bar.
Note that it is only enabled if you do not use double click on title bar to minimize. This can be checked at Appearance pane in System Preferences.
Real Zoom enables additional behavior of the green Zoom button of any window. Right click on it to maximize the given window to the full screen.
Real Close enables additional behavior of the red Close button of any window. Right click on it will quit the whole application immediately.